title: Spin exchange optical pumping based polarized 3He filling station for the Hybrid Spectrometer at the Spallation Neutron Source.
abstract: The Hybrid Spectrometer (HYSPEC) is a new direct geometry spectrometer at the Spallation Neutron Source at the Oak Ridge National Laboratory. This instrument is equipped with polarization analysis capability with 60° horizontal and 15° vertical detector coverages. In order to provide wide angle polarization analysis for this instrument, we have designed and built a novel polarized (3)He filling station based on the spin exchange optical pumping method. It is designed to supply polarized (3)He gas to HYSPEC as a neutron polarization analyzer. In addition, the station can optimize the (3)He pressure with respect to the scattered neutron energies. The depolarized (3)He gas in the analyzer can be transferred back to the station to be repolarized. We have constructed the prototype filling station. Preliminary tests have been carried out demonstrating the feasibility of the filling station. Here, we report on the design, construction, and the preliminary results of the prototype filling station.
authors.affiliation: Instrument and Source Design Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.
authors.forename: C Y
authors.initials: CY
authors.lastname: Jiang
authors.forename: X
authors.initials: X
authors.lastname: Tong
authors.forename: D R
authors.initials: DR
authors.lastname: Brown
authors.forename: H
authors.initials: H
authors.lastname: Culbertson
authors.forename: M K
authors.initials: MK
authors.lastname: Graves-Brook
authors.forename: M E
authors.initials: ME
authors.lastname: Hagen
authors.forename: B
authors.initials: B
authors.lastname: Kadron
authors.forename: W T
authors.initials: WT
authors.lastname: Lee
authors.forename: J L
authors.initials: JL
authors.lastname: Robertson
authors.forename: B
authors.initials: B
authors.lastname: Winn